It’s not something any business wants to think about, but every single business has vulnerabilities. Whether it’s a security flaw in the server OS that hasn’t been patched yet or just weak security policies for passwords, vulnerabilities exist. It’s only a matter of time before determined hackers find and exploit them.
While it’s not possible for a system to ever be 100% secure, especially with phishing emails and messages, it is possible to optimize security to drastically reduce the chance of a breach.
Remember that every vulnerability equals the risk of downtime, compromised data or even loss of data.